FTP客户端和服务器源代码(C语言)实现

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1、-课程设计：FTP的设计与实现/*client.c*/*include *include *include *pragmament(lib,ws2_32.lib)*define DEFAULT_PORT 2302*define DEFAULT_BUFFER 2048*define DEFAULT_MESSAGE This is a test of the emergency broadcasting systemcharszServerip128, / Server to connect to szMessage1024; / Message to send to severint iPort

2、 = DEFAULT_PORT;/ Port on server to connect to/DWORD dwCount = DEFAULT_COUNT; / Number of times to send messageBOOLbSendOnly = FALSE; / Send data only; dont receiveint dirfun();int getfun();int putfun();int pwdfun();int cdfun();int mdfun();int delfun();int usafun();void usage() printf(usage: client

3、-p:* -s:IP -n:* -onn); printf( -p:* Remote port to send ton); printf( -s:IP Servers IP address or hostnamen); printf( -n:* Number of times to send messagen); printf( -o Send messages only; dont receiven); E*itProcess(1);void ValidateArgs(int argc, char *argv)int i;for(i = 1; i 3) iPort = atoi(&argvi

4、3);break;case s: / Serverif (strlen(argvi) 3) strcpy(szServerip, &argvi3);break;case n: / Number of times to send messageif (strlen(argvi) 3)/dwCount = atol(&argvi3);break;case o: / Only send message; dont receive bSendOnly = TRUE;break;default: usage();break; int main(int argc, char *argv) WSADATA

5、wsd; SOCKET sClient;char szBufferDEFAULT_BUFFER;int ret;/unsigned int i;/int j;struct sockaddr_in server;struct hostent *host = NULL;char choice5,choice240;/ Parse the mand line and load Winsock/ argv1=-s:127.0.0.1; strcpy(szServerip, &argv13);/ValidateArgs(argc, argv);if (WSAStartup(MAKEWORD(2,2),

6、&wsd) != 0) printf(Failed to load Winsock library!n);return 1; /strcpy(szMessage, DEFAULT_MESSAGE);/ Create the socket, and attempt to connect to the server/ sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (sClient = INVALID_SOCKET) printf(socket() failed: %dn, WSAGetLastError();return 1; ser

7、ver.sin_family = AF_INET; server.sin_port = htons(iPort); printf(server.sin_port=%un,server.sin_port); server.sin_addr.s_addr = inet_addr(szServerip);/ If the supplied server address wasnt in the form/ aaa.bbb.ccc.ddd its a hostname, so try to resolve it/if (server.sin_addr.s_addr = INADDR_NONE) hos

8、t = gethostbyname(szServerip);if (host = NULL) printf(Unable to resolve server: %sn, szServerip);return 1; CopyMemory(&server.sin_addr, host-h_addr_list0, host-h_length); if (connect(sClient, (struct sockaddr *)&server, sizeof(server) = SOCKET_ERROR) printf(connect() failed: %dn, WSAGetLastError();r

9、eturn 1; /显示接通信息/for(j=0;j2;j+)/ ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);if (ret = 0) / Graceful closereturn 0;elseif (ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError();return 0; szBufferret = 0; printf(%sn,szBuffer);if(ret ); scanf(%s, choice);if(strncmp(choice,dir,3)=0|strn

10、cmp(choice,DIR,2)=0) dirfun(sClient);continue; elseif(strncmp(choice,pwd,3)=0|strncmp(choice,PWD,3)=0) pwdfun(sClient);continue; elseif(strncmp(choice,1)=0) usafun(sClient);continue; elseif(strncmp(choice,quit,4)=0|strncmp(choice,QUIT,2)=0) break; scanf(%s, choice2);if(strncmp(choice,get,3)=0|strncm

11、p(choice,GET,3)=0) getfun(sClient,choice2);continue; elseif(strncmp(choice,put,3)=0|strncmp(choice,PUT,3)=0) putfun(sClient,choice2);continue; elseif(strncmp(choice,cd,2)=0|strncmp(choice,CD,2)=0) cdfun(sClient,choice2);continue; elseif(strncmp(choice,md,2)=0|strncmp(choice,MD,2)=0) mdfun(sClient,ch

12、oice2);continue; elseif(strncmp(choice,del,3)=0|strncmp(choice,DEL,3)=0) delfun(sClient,choice2);continue; /else puts(输入错误，请重新输入); fflush(stdin); fflush(stdin); printf(n); printf(n); closesocket(sClient); WSACleanup();return 0;int dirfun(SOCKET sClient)int ret;char *MSG=dir$;char szBuffer80; strcpy(

13、szMessage, MSG); ret = send(sClient, szMessage, strlen(szMessage), 0);if (ret = 0)return 1;elseif (ret = SOCKET_ERROR) printf(send() failed: %dn, WSAGetLastError();return 1; /printf(Send %d bytesn, ret);/printf(bSendOnly=%dn,bSendOnly);while(!bSendOnly) /读取流并显示 /ret = recv(sClient, szBuffer, 80, 0);

14、/printf(%s,szBuffer); ret = recv(sClient, szBuffer, 80, 0);if (ret = 0) / Graceful closereturn 1;elseif(ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError();return 1; szBufferret = 0;if(strncmp(szBuffer,226 Close,strlen(226 Close)=0) break; printf(%s,szBuffer);if(strncmp(szBuffer,500 Syn

15、ta* error,strlen(500 Synta* error)=0) break; return 0;int getfun(SOCKET sClient,char filename40)int ret; FILE *fpre;char szBuffer80; szMessage0=0; strcat(szMessage, get$);/strcat(szMessage, ); strcat(szMessage,filename);/printf(MSG4=%cn,szMessage4);/szMessage0=g;szMessage1=e;szMessage2=t;/szMessage4

16、=m;szMessage5=e;szMessage6=.;szMessage7=t;/szMessage8=*;szMessage9=t;szMessage10=0; ret = send(sClient, szMessage, strlen(szMessage)+1, 0);if (ret = 0)return 1;elseif (ret = SOCKET_ERROR) printf(send() failed: %dn, WSAGetLastError();return 1; printf(Send %d bytesn, ret); ret = recv(sClient, szBuffer

17、, 80, 0);/*if (ret = 0) / Graceful close break; else if (ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError(); break; */ szBufferret = 0; printf(%sn,szBuffer);if(strncmp( szBuffer,125 Transfering.,strlen(125 Transfering.) )=0) if( (fpre=fopen(filename,w) = NULL ) printf(open errer);retur

18、n 1; printf(bSendOnly=%dn,bSendOnly);while(!bSendOnly) /读取流并显示 ret = recv(sClient, szBuffer, 80, 0);if (ret = 0) / Graceful closereturn 1;elseif (ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError();return 1; szBufferret = 0;/printf(%s,szBuffer); if(strncmp(szBuffer,226 Transfer,strlen(2

19、26 Transfer)=0) break; if(strncmp(szBuffer,500 Synta* error,strlen(500 Synta* error)=0) break; fprintf(fpre,%s,szBuffer); printf(%sn,szBuffer); fclose(fpre); return 0;int putfun(SOCKET sClient,char filename40)int ret;/int i; FILE *fpse;/char *filename;/char *MSG=get0me.t*t;char szBuffer80,temp_buffe

20、r80;/sprintf(szMessage, get0,te.t*t0); szMessage0=0; strcat(szMessage, put$); strcat(szMessage,filename); ret = send(sClient, szMessage, strlen(szMessage)+1, 0);if (ret = 0)return 0;elseif (ret = SOCKET_ERROR) printf(send() failed: %dn, WSAGetLastError();return 1; /printf(Send %d bytesn, ret);/filen

21、ame=me.t*t; printf(filename=%sn,filename);if( (fpse=fopen(filename,r) = NULL ) printf(open errer);return 1; else printf(The file %s found,ready to transfer.n,filename);/i=0;while (fgets(temp_buffer,80,fpse)!=NULL) sprintf(szBuffer,%s,temp_buffer); send(sClient, szBuffer, 80, 0); sprintf(szBuffer, 22

22、6 Transfer pleted. rn); ret = send(sClient, szBuffer, strlen(szBuffer), 0); fclose(fpse);return 0;int pwdfun(SOCKET sClient)int ret;char *MSG=pwd$;char szBuffer160; strcpy(szMessage, MSG); ret = send(sClient, szMessage, strlen(szMessage), 0);if (ret = 0)return 1;elseif (ret = SOCKET_ERROR) printf(se

23、nd() failed: %dn, WSAGetLastError();return 1; printf(Send %d bytesn, ret); printf(bSendOnly=%dn,bSendOnly);while(!bSendOnly) /读取流并显示 ret = recv(sClient, szBuffer, 160, 0);if (ret = 0) / Graceful closereturn 1;elseif (ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError();return 1; szBuffer

24、ret = 0; printf(%sn,szBuffer);if(strncmp(szBuffer,226 Close,strlen(226 Close)=0) break; if(strncmp(szBuffer,500 Synta* error,strlen(500 Synta* error)=0) break; return 0;int cdfun(SOCKET sClient,char pathname40)int ret; szMessage0=0; strcat(szMessage, cd$); strcat(szMessage,pathname); ret = send(sCli

25、ent, szMessage, strlen(szMessage)+1, 0);if (ret = 0)return 1;elseif (ret = SOCKET_ERROR) printf(send() failed: %dn, WSAGetLastError();return 1; printf(Send %d bytesn, ret);return 0;int mdfun(SOCKET sClient,char pathname20)int ret;char szBuffer160;/char *MSG=md$; szMessage0=0; strcat(szMessage, md$);

26、/strcat(szMessage, ); strcat(szMessage,pathname);/strcpy(szMessage, MSG); ret = send(sClient, szMessage, strlen(szMessage)+1, 0);if (ret = 0)return 1;elseif (ret = SOCKET_ERROR) printf(send() failed: %dn, WSAGetLastError();return 1; printf(Send %d bytesn, ret);while(!bSendOnly) /读取流并显示 ret = recv(sC

27、lient, szBuffer, 80, 0);if (ret = 0) / Graceful closereturn 1;elseif (ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError();return 1; szBufferret = 0; printf(%s,szBuffer); if(strncmp(szBuffer,226 Close,strlen(226 Close)=0) break; if(strncmp(szBuffer,500 Synta* error,strlen(500 Synta* erro

28、r)=0) break; return 0;int delfun(SOCKET sClient,char name20)int ret;char szBuffer80; szMessage0=0; strcat(szMessage, del$); strcat(szMessage,name); ret = send(sClient, szMessage, strlen(szMessage)+1, 0);if (ret = 0)return 1;elseif (ret = SOCKET_ERROR) printf(send() failed: %dn, WSAGetLastError();ret

29、urn 1; printf(Send %d bytesn, ret);while(!bSendOnly) ret = recv(sClient, szBuffer, 80, 0);if (ret = 0) / Graceful closereturn 1;elseif (ret = SOCKET_ERROR) printf(recv() failed: %dn, WSAGetLastError();return 1; szBufferret = 0;if(strncmp(szBuffer,del ok,strlen(del ok)=0) printf(del %s okn,name);brea

30、k; printf(%s,szBuffer);if(strncmp(szBuffer,500 Synta* error,strlen(500 Synta* error)=0) break; return 0;int usafun() puts(-); puts(get：取远方的一个文件); puts(put：传给远方一个文件); puts(pwd：显示远主当前目录); puts(dir：列出远方当前目录); puts(md ：在远方新建文件夹); puts(cd ：改变远方当前目录); puts(. ：显示你提供的命令); puts(quit ：退出返回);return 0;/int quit

31、()/*server.c*/*include *include *include *pragmament(lib,ws2_32.lib)WSADATA wsd;char sbuffer80,rbuffer80;/send and receive buffersint n,bytes;/countersSOCKET newsocket,ns_data;struct sockaddr_in remoteaddr; /remoteaddr_data;int port_connect=0;/port connect flagchar path80=;char order100=;/SOCKET s_d

32、ata_port;int sy_error=1; / use for indicate Synta* error/server functionsint sdirfun(SOCKET newsocket);int sgetfun(SOCKET newsocket);int sputfun(SOCKET newsocket);int spwdfun(SOCKET newsocket);int scdfun(SOCKET newsocket);int smdfun(SOCKET newsocket);int sdelfun(SOCKET newsocket);void HandleError(ch

33、ar *func);/server functions end/MAINint main(int argc, char *argv) struct sockaddr_in localaddr;/local address structureSOCKET s;/s_data;/wele socket and wele socket for data connection,and port connection for connect to clientint addr_inlen;/address lenght variableif (WSAStartup(MAKEWORD(2,2), &wsd

34、) != 0)WSACleanup();printf(WSAStartup failedn);memset(&localaddr,0,sizeof(localaddr);/clear localaddrs = socket(PF_INET, SOCK_STREAM, 0);if (s 0)printf(socket failedn);localaddr.sin_family = AF_INET;if(argc = 2) localaddr.sin_port = htons(u_short)atoi(argv1);elselocaladdr.sin_port = htons(2302);loca

35、laddr.sin_addr.s_addr = INADDR_ANY;if (bind(s,(struct sockaddr *)(&localaddr),sizeof(localaddr) 0)printf(Bind failed!n); /INFINITE LOOPwhile (1) / while loop 1/LISTENlisten(s,3);addr_inlen = sizeof(remoteaddr);/ACCEPT main connection (control connection)newsocket = accept(s,(struct sockaddr *)(&remo

36、teaddr),&addr_inlen);if (newsocket = INVALID_SOCKET) break;printf(connected to %s at port %d n,inet_ntoa(remoteaddr.sin_addr),ntohs(localaddr.sin_port);/Respond with wele message, FTP client requires thosesprintf(sbuffer,200 Wele rn);bytes = send(newsocket, sbuffer, strlen(sbuffer), 0);sprintf(sbuff

37、er,530 Log in rn);bytes = send(newsocket, sbuffer, strlen(sbuffer), 0);/INFINITE LOOPwhile (1) / while loop 2n = 0;sy_error=1;while (1) / while loop 3/RECEIVEbytes = recv(newsocket, &rbuffern, 1, 0);printf(rbuffer%d=%cn,n,rbuffern);if (bytes 0) | (bytes = 0)break;if (rbuffern = $)rbuffern = 0;break;

38、 if (rbuffern != r)n+; / end of while loop 3 if (bytes tmp.t*t);system(order);FILE *fin;fin=fopen(tmp.t*t,r);sprintf(sbuffer, 125 Transfering. rn);bytes = send(newsocket, sbuffer, strlen(sbuffer), 0);while (fgets(temp_buffer,80,fin)!=NULL)sprintf(sbuffer,%s,temp_buffer); /if (port_connect=0) send(ne

39、wsocket, sbuffer, strlen(sbuffer), 0);fclose(fin);sprintf(sbuffer, 226 Transfer pleted. rn);bytes = send(newsocket, sbuffer, strlen(sbuffer), 0);system(del tmp.t*t);/CLOSE the ns_data SOCKET or data port SOCKETif(port_connect=0) closesocket(ns_data);sprintf(sbuffer,226 Close the data socket. rn);byt

40、es = send(newsocket, sbuffer, strlen(sbuffer), 0);ns_data = socket(AF_INET, SOCK_STREAM, 0);sy_error=0;return 0;int sgetfun(SOCKET newsocket)printf(RETR mode.rn);int i=4,k=0;char filename20,temp_buffer80;/ identify the filename from rbuffer after the word RETR while (1) / while loop 4/RECEIVEbytes = recv(newsocket, &rbufferi, 1, 0);printf(rbufferi=%cn,rbufferi);if (bytes 0)strcat(order,);strcat(order,filename);char *p_filename=order; FILE *fp;if( (fp=fopen(p_filename,r) = NULL )sprintf(sbuffer, Sorry, cannot open %s. Please try again.rn,filename);bytes = send(newsocket, sb